<svg version="1.1" id="mscgen_js-svg-__svg" class="mscgen_js-svg-__svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="976" height="386" viewBox="0 0 976 386"><desc>

# Generated by mscgen_js - https://sverweij.github.io/mscgen_js
msc {
  # options
  hscale="1.5";

  # entities
  c [label="Client", textbgcolor="lime"],
  rails [label="Rails", textbgcolor="cyan"],
  etag [label="EtagCaching", textbgcolor="orange"],
  redis [label="Redis", textbgcolor="white"];

  # arcs
  c =&gt; rails [label="GET /projects/5/pipelines"];
  rails =&gt; etag [label="GET /projects/5/pipelines"];
  etag =&gt; redis [label="read(key = 'GET &lt;Etag&gt;')"];
  redis =&gt; etag [label="cache miss", linecolor="red", textcolor="red"];
  |||;
  etag =&gt; redis [label="write('&lt;New Etag&gt;')"];
  etag =&gt; rails [label="GET /projects/5/pipelines"];
  rails =&gt; c [label="JSON response w/ ETag", linecolor="blue", textcolor="blue"];
}
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class="arcrow"></line><line x1="795" y1="114" x2="795" y2="152" class="arcrow"></line><line x1="75" y1="152" x2="75" y2="190" class="arcrow"></line><line x1="315" y1="152" x2="315" y2="190" class="arcrow"></line><line x1="555" y1="152" x2="555" y2="190" class="arcrow"></line><line x1="795" y1="152" x2="795" y2="190" class="arcrow"></line><line x1="75" y1="190" x2="75" y2="228" class="arcrow"></line><line x1="315" y1="190" x2="315" y2="228" class="arcrow"></line><line x1="555" y1="190" x2="555" y2="228" class="arcrow"></line><line x1="795" y1="190" x2="795" y2="228" class="arcrow"></line><line x1="75" y1="228" x2="75" y2="266" class="arcrow"></line><line x1="315" y1="228" x2="315" y2="266" class="arcrow"></line><line x1="555" y1="228" x2="555" y2="266" class="arcrow"></line><line x1="795" y1="228" x2="795" y2="266" class="arcrow"></line><line x1="75" y1="266" x2="75" y2="304" class="arcrow"></line><line x1="315" y1="266" x2="315" y2="304" class="arcrow"></line><line x1="555" y1="266" x2="555" y2="304" class="arcrow"></line><line x1="795" y1="266" x2="795" y2="304" class="arcrow"></line><line x1="75" y1="304" x2="75" y2="342" class="arcrow"></line><line x1="315" y1="304" x2="315" y2="342" class="arcrow"></line><line x1="555" y1="304" x2="555" y2="342" class="arcrow"></line><line x1="795" y1="304" x2="795" y2="342" class="arcrow"></line><line x1="75" y1="342" x2="75" y2="380" class="arcrow"></line><line x1="315" y1="342" x2="315" y2="380" class="arcrow"></line><line x1="555" y1="342" x2="555" y2="380" class="arcrow"></line><line x1="795" y1="342" x2="795" y2="380" class="arcrow"></line></g><g id="mscgen_js-svg-__svg__sequencelayer"><g id="mscgen_js-svg-__svgentities"><g><rect width="150" height="38" class="entity" style="fill:lime;"></rect><g><text x="75" y="22.5" class="entity-text "><tspan>Client</tspan></text></g></g><g><rect width="150" height="38" x="240" class="entity" style="fill:cyan;"></rect><g><text x="315" y="22.5" class="entity-text "><tspan>Rails</tspan></text></g></g><g><rect width="150" height="38" x="480" class="entity" style="fill:orange;"></rect><g><text x="555" y="22.5" class="entity-text "><tspan>EtagCaching</tspan></text></g></g><g><rect width="150" height="38" x="720" class="entity" style="fill:white;"></rect><g><text x="795" y="22.5" class="entity-text "><tspan>Redis</tspan></text></g></g></g><g><line x1="75" y1="95" x2="315" y2="95" class="arc directional method" style="stroke:black" marker-end="url(#mscgen_js-svg-__svgmethod-black)"></line><g><rect width="134.06" height="14" x="127.97" y="79.5" class="label-text-background"></rect><text x="195" y="90.5" class="directional-text method-text "><tspan>GET /projects/5/pipelines</tspan></text></g></g><g><line x1="315" y1="133" x2="555" y2="133" class="arc directional method" style="stroke:black" marker-end="url(#mscgen_js-svg-__svgmethod-black)"></line><g><rect width="134.06" height="14" x="367.97" y="117.5" class="label-text-background"></rect><text x="435" y="128.5" class="directional-text method-text "><tspan>GET /projects/5/pipelines</tspan></text></g></g><g><line x1="555" y1="171" x2="795" y2="171" class="arc directional method" style="stroke:black" marker-end="url(#mscgen_js-svg-__svgmethod-black)"></line><g><rect width="135.64" height="14" x="607.17" y="155.5" class="label-text-background"></rect><text x="675" y="166.5" class="directional-text method-text "><tspan>read(key = 'GET &lt;Etag&gt;')</tspan></text></g></g><g><line x1="795" y1="209" x2="555" y2="209" class="arc directional method" style="stroke:red" marker-end="url(#mscgen_js-svg-__svgmethod-red)"></line><g><rect width="60.02" height="14" x="644.98" y="193.5" class="label-text-background"></rect><text x="675" y="204.5" class="directional-text method-text " style="fill:red;"><tspan>cache miss</tspan></text></g></g><g></g><g><line x1="555" y1="285" x2="795" y2="285" class="arc directional method" style="stroke:black" marker-end="url(#mscgen_js-svg-__svgmethod-black)"></line><g><rect width="103.94" height="14" x="623.02" y="269.5" class="label-text-background"></rect><text x="675" y="280.5" class="directional-text method-text "><tspan>write('&lt;New Etag&gt;')</tspan></text></g></g><g><line x1="555" y1="323" x2="315" y2="323" class="arc directional method" style="stroke:black" marker-end="url(#mscgen_js-svg-__svgmethod-black)"></line><g><rect width="134.06" height="14" x="367.97" y="307.5" class="label-text-background"></rect><text x="435" y="318.5" class="directional-text method-text "><tspan>GET /projects/5/pipelines</tspan></text></g></g><g><line x1="315" y1="361" x2="75" y2="361" class="arc directional method" style="stroke:blue" marker-end="url(#mscgen_js-svg-__svgmethod-blue)"></line><g><rect width="130.72" height="14" x="129.63" y="345.5" class="label-text-background"></rect><text x="195" y="356.5" class="directional-text method-text " style="fill:blue;"><tspan>JSON response w/ ETag</tspan></text></g></g></g><g id="mscgen_js-svg-__svg__notelayer"></g><g id="mscgen_js-svg-__svg__watermark"></g></g></svg>